Description
Screw caps N-8 closed are laboratory closure components made from black polypropylene for vials and related sample vessels that use the N-8 thread. Each cap is supplied closed and without a seal, providing a simple solid PP lid where an integrated septum or liner is not required. The pack contains 100 pieces, with a combined net weight of 0,044 kg, so benches and stores can replenish common N-8 formats in a practical bulk unit. Black PP offers a durable, chemically resistant housing suitable for everyday sample handling, storage and transport of laboratory containers fitted with matching N-8 necks. These closures are produced by manufacturer Witeg and fit standard screw-cap workflows in analytical, quality-control and general laboratory environments. Because the design omits a gasket, users select separate seals or liners only when the application demands them, keeping the basic cap versatile for dry goods, non-critical holds or setups that already specify an independent sealing disc. Compact pack size and uniform N-8 geometry support organised stocking next to vials, inserts and other screw-thread accessories in chromatography and sample-prep areas.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Material: black PP
- Cap size: N-8
- Design: closed, without seal
- Colour: black
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Questions about Screw caps N-8 closed
What is this article?
Screw caps N-8 closed is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Labware.
A screw cap has a thread and a liner. The thread has to match the bottle. The liner has to survive the liquid: a pulp liner fails in a solvent that a PTFE-faced liner ignores. The colour of the cap is not the specification.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Screw caps & closures. The catalogue is Labware.
Shelves beside this one are Rubber & silicone stoppers, Ground-joint glass stoppers, Lids & seals and Closures (other).
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.